102815399 has 2 divisors, whose sum is σ = 102815400. Its totient is φ = 102815398.

The previous prime is 102815333. The next prime is 102815429. The reversal of 102815399 is 993518201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102815399 - 2⁸ = 102815143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102815299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51407699 + 51407700.

It is an arithmetic number, because the mean of its divisors is an integer number (51407700).

Almost surely, 2^102815399 is an apocalyptic number.

102815399 is a deficient number, since it is larger than the sum of its proper divisors (1).

102815399 is an equidigital number, since it uses as much as digits as its factorization.

102815399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 102815399 is about 10139.7928479826. The cubic root of 102815399 is about 468.4746064971.

The spelling of 102815399 in words is "one hundred two million, eight hundred fifteen thousand, three hundred ninety-nine".